Rochefort is a Walloonmunicipality located in the Belgian province of Namur close to the Ardennes. On January 1, 2006 Rochefort had a total population of 12,038. The total area is 165.27 km² which gives a population density of 73 inhabitants per km². It was a resort in the 19th century.

Its ancient position at the crossroads where the route to Saint-Hubert crossed that from Liège to Bouillon required fortifying: the ruins of the old castle, which gave the place its name and a title to a long line of counts who had the right of coining their own money, still exist. This castle underwent many sieges and suffered at the hands of Marshal de Châtillon (1636).

Near Rochefort are the famous red marble quarries of St Remy, and Rochefort Abbey, a Trappist monastery, which operates the Rochefort Brewery, famous for brewing dark and sweet beers, especially the extremely popular Rochefort 10, whose deep dark-brown color and rich, fruity palate inspire a cult following.